Pliers and similar tool.



W. S. THOMSON.

PUERS AND SIMILAR TOOL.

APPLECATION FILED FEB. 4. 1915.

1,].59 621 Patented Nov. 9, 1915.

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UNITED erases FFICE.

WILLIAM S. THOMSON, PLANTSVILLE, CONNECTICUT, ASSIGNOB T THE E. D. SMITH v & COMPANY. OF ?LANTSVILLE, CQNNEC'IICUT. A CORPORATION.

rniniis an]: SIMILAR 'rooL.

Specification of Letters Patent.

Patented Nov. 1915.

Application filed February 4. 1915. Serial Ho. 6,088.

construction and'convenience and efiiciency L5 in use. w

In the accompanying drawing :"Figure 1 is a front elevation of" a pair of pliers embodying my invention. Fig. 2 is a side ele- .vation of the same. Fig. 3 is a front elevation of a modification and with the parts in the open position. Figfl is a sectional view on an enlarged scale on the line a. m of Fig. 1.

. Fig. 5 is av view corresponding to Fig. 1 and on the same scale of a modification show ng a ivot pin.

invention, comprise a pair or similar members 10 having pinching jaws 11 at one end and vhandles 12at-the other end. the said members being pivotally connected at the portions 13 intermediate the said ends ina special manner to be described. The sa d intermediate portions 13 are circular 1n formation, having opposed faces 16 in-abut ment, and they are provided with radial recesses that cooperate to serve as cutting ]a,WS. A plurality of such recesses is shown, comprising lateral recesses 14 at each side and u axial recesses 25 that are located at the bases of the pinching jaws 11.

4 The special means ofpivotally connecting l the members 10 involve the following construction. It will be no'tedthat the morn; bers 10 cross at the point of pivotal conwhich the followinghe pliers shown in l embodying my nection, as is usual with pliers, the pinchcent outer face of the intermediate overlap ping portion 13, as will be noted in Fig. 4.

The swelled portion 1.3 referred to of each member will be on one side of the pivotal axis. 0n the side diametrically opposed to the swelled shank portion 15 the pinching jaw is similarly swelledor thickened, as will be also noted from Fig. l. and as shown at 17. That is to say, the thickness of the pinching jaws 11 and the shank portions 15 correspond essentially tothe combined thickness of the overlapping portions 13. The features so far described are usual in pliers. l utilize the thickened shank portion 15 and the thickened pinching jaw portion 17 a s means for holding the members 10 pivotally connected, and this feature I believe to be new.

Referring to the sectional view in Fig. 4

it \vill be noted'that the overlapping portions 13 comprise a cylindrical wall portion 18 adjacent the bearing faces 16 and exteriorly of the same there is a conical portion 19, comprising essentially a tapering or removal of the corner of the outer-endof the cylindrical portion 18. Of course, the relative proportions of the cylindrical portion 18 and the tapered portion 19 may be varied according to any degree desired, so long as a reduced portionlil is provided of appre ciable 'egitent. That is to say, for the tapered form shown for the reduced portion a different form may be provided than that shown.

. In order to complete the joint, operatively uniting the members 10, the swelled portions 15 and 17,are made to fit thecpposed walls.

of the overlapping portions 13. As shown this consists of providing a cylindrical por:

tion that fits against the cylindrical portion 18, and which consists of the body material and an overhanging portion so that fits over the tapered or reduced portion 19 or" whatever particular form the same my As the opposed or engaged portions are of circular formation being concentric w th the pivotal axis. and each censisl'slorian apple w ciable arc, the joint vprovided serves to positively unite the members 10 and so as to permit or relative pivotal mnvement. the

be styled an incased ticularly applicable to the otal pin, although such a pin 21 may be provided in some cases, as in the modified form 10 shown in Fig. 5.

An advantage that is possible with the incased joint shown and described and parthe pivotal pin is found in the modification shown in Fig. 3 and applied to the radial cutting jaws, such as the jaws provided in members 10" shown in the said figure. It will be noted that these jaws may be made of any depth desired, so long as the members 10" are not cut in two, the practical limit being to have the depth of the jaw forming recesses terminate at the pivotal axis, where the cutting movement willbe zero.

Of course, as the. depth of the jaw recesses 25 is increased the cutting movement will be reduced, the limit being zero, as mentioned, and as the cutting movement is reduced the cutting leverage. is increased, so that with a deep recess 25' a corresponding powerful cutting effect will be produced.

It will be noted that means are provided for pivotally connecting the members 10 that are integral with the said members, so that the complete tool may consist of simply two parts, the flange-like overhanging portion 20 serving to hold the members together. Any form of pinching, jaws may be provided, or these may be omitted altogether. Also, the pinching jaws may be omitted or these may be replaced by some form of cutting jaws.

I claim as my invention l 1. Pliers comprising a pair of mating members, the said members being similar and having overlapping portions of circular formation, said overlapping portions having their exterior portions reducedat the, edges, and the said members having each diametrally disposed and inwardly directed flanges engaged with the said exterior reduccd portion of the other of the said members.

form omitting 2. Pliers comprising a pair of mating' ping portions, each of the said members having flange portions on each side of the axis, and the said flange portions extending inwardly so as to overhang the opposed edge of the mating member suit-ably to prevent separation of the said members.

A pair of members having overlapping portions provided with radial cutting jaws, the said cutting jaws being formed by radial recesses that extend to the pivotal axis of the .said members. the said members being similar, and each being provided with disposed and inwardly directdiametrally disposed flanges that extend inwardly so as to overhang the opposed edge portion of the mating member.

5. lliers comprising a pair of mating members. the said members being non-sepa rablv connected together by means of an in- -cased joint. and the said joint comprising circular overlapping portions. shoulders diametrally disposed on each member and engaged with'the opposed edge portion of the other n'len'iber. and flanges extending in wardly from the outer portions of the said shoulders suitably to overhang the said edge portions of the other member.

v WILLIAM S. THOMSON.

Witnesses: i

Guo. R. BOND, F. H. (lamux. 

